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CLAIMS
1. A method for processing an input signal, comprising
the steps of:
(A) extracting a compressed signal and a first checksum
from said input signal;
(B) generating a decompressed signal by decompressing
said compressed signal;
(C) calculating a second checksum for said decompressed
signal; and
(D) generating a result by comparing said first checksum
to said second checksum.
2. The method according to claim 1, further comprising
the steps of:
extracting a quality value from said input signal, (i)
said quality value indicating a correlation between an original
signal and a reconstructed signal and (ii) said reconstructed
signal being generated by decompressing said compressed signal; and
transferring said decompressed signal, said quality value
and said result to a user.
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3. The method according to claim 2, wherein (i) said
input signal comprises a digital video bitstream in an encoded
form, (ii) said quality value comprises a peak signal-to-noise
ratio, (iii) said first checksum comprises a cyclic redundancy
check and (iv) said result indicates one of a match and a non-match
between said first checksum and said second checksum.
4. The method according to claim 1, wherein step (C)
comprises the sub-step of:
calculating said second checksum for a sub-picture of
video in said decompressed signal .
5. The method according to claim 1, wherein step (C)
comprises the sub-step of:
calculating said second checksum for a macroblock of
video in said decompressed signal .
6. The method according to claim 1, wherein said second
checksum comprises a plurality of checksums, one each for at least
a luminance channel, a first chrominance channel and a second
chrominance channel of said decompressed signal .
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7. The method according to claim 1 wherein said
decompressed signal comprises an audio signal .
8. The method according to claim 1, wherein said input
signal is compliant with at least one of an International
Organization for Standardization/International Electrotechnical
Commission 14496-10 standard and an International Telecommunication
5 Union-Telecommunications Standardization Sector Recommendation
H.264 accounting for said first checksum.
9. The method according to claim 1, wherein step (C)
comprises the sub-step of:
calculating said second checksum by summing each absolute
difference of two consecutive data samples over a predetermined
5 number of said consecutive data samples within said decompressed
signal .
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10. A method for processing an input signal, comprising
the steps of:
(A) extracting a compressed signal and a quality value
from said input signal, (i) said quality value indicating a
correlation between an original signal and a reconstructed signal
and (ii) said reconstructed signal being generated by decompressing
said compressed signal;
(B) generating a decompressed signal by decompressing
said compressed signal; and
(C) transferring said decompressed signal and said
quality value to a user.
11. The method according to claim 10, further comprising
the steps of:
extracting a first checksum from said input signal;
calculating a second checksum for said decompressed
signal ;
generating a result by comparing said first checksum to
said second checksum; and
transferring said result to said user.
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12. The method according to claim 11, wherein (i) said
input signal comprises a digital video bitstream in an encoded
form, (ii) said quality value is a peak signal-to-noise ratio,
(iii) said first checksum comprises a cyclic redundancy check and
5 (iv) said result indicates one of a match and a non-match between
said first checksum and said second checksum.
13. The method according to claim 10, wherein said
quality value comprises a signal-to-noise ratio having a noise
component based on a difference between said original signal and
said reconstructed signal .
14. The method according to claim 10, wherein said
quality value comprises a sum of absolute differences between said
original signal and said reconstructed signal .
15. The method according to claim 10, wherein said
quality value comprises a plurality of values, one each for at
least a luminance channel, a first chrominance channel and a second
chrominance channel of said original signal .
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16. The method according to claim 10, wherein said input
signal is compliant with at least one of an International
Organization for Standardization/International Electrotechnical
Commission 144 96-10 standard and an International Telecommunication
Union- Telecommunications Standardization Sector Recommendation
H.264 accounting for said quality value.
17. A method for processing an original signal,
comprising the steps of:
(A) generating a compressed signal by compressing said
original signal;
(B) generating a reconstructed signal by decompressing
said compressed signal;
(C) calculating at least one of (i) a first checksum for
said reconstructed signal and (ii) a quality value indicating a
correlation between said original signal and said reconstructed
signal; and
(D) generating an output signal comprising said
compressed signal and said at least one of said checksum and said
quality value.
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18. The method according to claim 17, wherein said first
checksum comprises a plurality of checksums, one each for at least
a luminance channel, a first chrominance channel and a second
chrominance channel of said original signal.
19. The method according to claim 17, wherein said first
checksum covers a sub-picture of video in said reconstructed
signal .
20. The method according to claim 17, wherein said first
checksum covers a macroblock of video in said reconstructed signal.
21. The method according to claim 17, wherein (i) said
original signal comprises a video signal, (ii) said quality value
comprises a peak signal-to-noise ratio and (iii) said first
checksum comprises a cyclic redundancy check.
22. The method according to claim 17, wherein said
original signal comprises an audio signal.
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23. The method according to claim 17, further comprising
the step of:
transferring said quality value to a user.
24. The method according to claim 17, wherein said
output signal is compliant with at least one of an International
Organization for Standardization/International Electrotechnical
Commission 14496-10 standard and an International Telecommunication
Union-Telecommunications Standardization Sector Recommendation
H.264 accounting for said quality value and said first checksum.
25. The method according to claim 17, wherein step. (C)
comprises the sub-step of:
calculating said first checksum by summing each absolute
difference of two consecutive data samples oyer a predetermined
number of said consecutive data samples within said reconstructed
signal .
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